# What happens to the steady state of the series RC circuit if changes happen to any circuit element?

The question that I'm trying to understand is the following:

In any series RC circuit that is in steady state, WHEN any of the elements changes (R, C, or applied voltage), the following will happen to the circuit:

(A) The circuit will briefly operate in steady state then gradually go on a transient state.

(B) The circuit will immediately go on a transient state then reach a steady state.

(C) The circuit will immediately go to a transient state.

My answer is B since, according to the textbook, the transient response is a circuit's temporary response that will die out with time and the steady-state response stays for a long time after an external excitation is applied. Now, is that external excitation include changes in any of the circuit elements?

• WHEN any of the elements (R, C, or applied voltage) what? when they do what? Jun 19, 2020 at 13:01
• @Andyaka, when they 'change.' Sorry, I edited the question already. Jun 19, 2020 at 13:14